The following repairs were performed due to the yellow illumination of the Check Engine light: 1) Performed open campaign for the turbo heat shield; added heat shield as per recall: No charge due to recall 2) Performed carbon cleaning and programming in response to 'check engine' light. The cause was due to multiple misfire faults and 02 sensor ageing fault S found for post CAT 02. Found car to have carbon build up on the intake valves: Parts: $251.92 Labor: $1350.00 3) Performed fuel injection and induction system cleaning: Parts: $54.00 Labor: $100.46 4) Performed standard scope: Labor: $80.00 5) Replaced the rear brake pads (normal ware; no complaint with this repair) Parts: $337.82 Labor: $176.00 6) Replaced leaking oil filter housing and turbo oil feed line: Parts: $436.29 Labor: $1822.50 7) Replaced leaking vacuum pump: Parts: $525.61 Labor: $1822.50 8) Replaced leaking water pump: Parts: $201.79 Labor: $652.50 9) Replaced oxygen sensor: Parts: $317.73 Labor: $78.75 (this amount was charged twice; haven't received follow up as to if this was in error)